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library(dplyr)
library(ggplot2)
library(tidyr)
library(car)
library(MASS)
library(repr)
library(pals)
getwd()
[1] "C:/Users/Natalie/git_proj/Is-your-electric-car-overpriced-"
ecars_raw = ecars_raw %>% rename(Price = Price.DE., Acceleration = acceleration..0.100.)
Error in `rename()`:
! Can't rename columns that don't exist.
✖ Column `Price.DE.` doesn't exist.
Backtrace:
 1. ecars_raw %>% rename(Price = Price.DE., Acceleration = acceleration..0.100.)
 3. dplyr:::rename.data.frame(., Price = Price.DE., Acceleration = acceleration..0.100.)
make = strsplit(ecars_raw$Car_name, split = ' ')

make_ = c()
n = length(make)

for (i in 1:n) {
  make_[i] = make[[i]][1]
}

ecars_raw$Make = make_
ecars_raw = ecars_raw %>% relocate(Make, .before = Car_name_link)
ecars_raw = ecars_raw %>% relocate(Battery, .after = Car_name_link)
ecars_raw
make_colors = c('#e6194b', '#f58231',  '#ffe119', 
                '#bcf60c','#3cb44b', '#008080',
                '#aaffc3', '#4363d8', '#000075',
                '#46f0f0', '#911eb4', '#e6beff',
                '#f032e6', '#fabebe')
summary(price_model_full)

Call:
lm(formula = Price ~ Battery + Efficiency + Fast_charge + Range + 
    Top_speed + Acceleration, data = ecars)

Residuals:
   Min     1Q Median     3Q    Max 
-53557 -11739   -178   8223  84430 

Coefficients:
               Estimate Std. Error t value Pr(>|t|)    
(Intercept)  -1.613e+05  2.398e+04  -6.724 8.91e-11 ***
Battery       2.215e+02  3.506e+02   0.632  0.52798    
Efficiency    3.052e+02  1.140e+02   2.678  0.00781 ** 
Fast_charge   1.785e+01  7.819e+00   2.283  0.02315 *  
Range         9.066e+00  6.679e+01   0.136  0.89211    
Top_speed     7.013e+02  7.086e+01   9.897  < 2e-16 ***
Acceleration  1.762e+03  7.746e+02   2.274  0.02366 *  
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 18530 on 300 degrees of freedom
Multiple R-squared:  0.7167,    Adjusted R-squared:  0.711 
F-statistic: 126.5 on 6 and 300 DF,  p-value: < 2.2e-16
forwardAIC = step(price_model_empty, scope, direction = 'forward', k = 2)
Start:  AIC=6415.84
Price ~ 1

               Df  Sum of Sq        RSS    AIC
+ Top_speed     1 2.1023e+11 1.5319e+11 6152.6
+ Battery       1 1.7911e+11 1.8431e+11 6209.4
+ Fast_charge   1 1.3923e+11 2.2419e+11 6269.5
+ Range         1 1.2615e+11 2.3728e+11 6287.0
+ Acceleration  1 1.0296e+11 2.6046e+11 6315.6
+ Efficiency    1 1.1067e+10 3.5235e+11 6408.3
<none>                       3.6342e+11 6415.8

Step:  AIC=6152.62
Price ~ Top_speed

               Df  Sum of Sq        RSS    AIC
+ Efficiency    1 4.2802e+10 1.1039e+11 6054.0
+ Battery       1 1.9965e+10 1.3322e+11 6111.8
+ Acceleration  1 1.5065e+10 1.3812e+11 6122.8
<none>                       1.5319e+11 6152.6
+ Fast_charge   1 2.2387e+08 1.5297e+11 6154.2
+ Range         1 7.0491e+07 1.5312e+11 6154.5

Step:  AIC=6054.03
Price ~ Top_speed + Efficiency

               Df  Sum of Sq        RSS    AIC
+ Fast_charge   1 3519695484 1.0687e+11 6046.1
+ Range         1 3506122724 1.0688e+11 6046.1
+ Battery       1 3063673448 1.0732e+11 6047.4
+ Acceleration  1  915987463 1.0947e+11 6053.5
<none>                       1.1039e+11 6054.0

Step:  AIC=6046.08
Price ~ Top_speed + Efficiency + Fast_charge

               Df  Sum of Sq        RSS    AIC
+ Range         1 2137906570 1.0473e+11 6041.9
+ Battery       1 2032210165 1.0484e+11 6042.2
+ Acceleration  1  713779942 1.0615e+11 6046.0
<none>                       1.0687e+11 6046.1

Step:  AIC=6041.87
Price ~ Top_speed + Efficiency + Fast_charge + Range

               Df  Sum of Sq        RSS    AIC
+ Acceleration  1 1639080066 1.0309e+11 6039.0
<none>                       1.0473e+11 6041.9
+ Battery       1    1076868 1.0473e+11 6043.9

Step:  AIC=6039.03
Price ~ Top_speed + Efficiency + Fast_charge + Range + Acceleration

          Df Sum of Sq        RSS    AIC
<none>                 1.0309e+11 6039.0
+ Battery  1  1.37e+08 1.0295e+11 6040.6
summary(price_model)

Call:
lm(formula = Price_lambda ~ Efficiency + Fast_charge + Range + 
    Top_speed + Acceleration, data = ecars)

Residuals:
       Min         1Q     Median         3Q        Max 
-2.951e-04 -4.127e-05  8.710e-06  4.794e-05  1.467e-04 

Coefficients:
               Estimate Std. Error   t value Pr(>|t|)    
(Intercept)   1.413e+00  5.206e-05 27130.409  < 2e-16 ***
Efficiency    3.059e-06  1.332e-07    22.957  < 2e-16 ***
Fast_charge   1.407e-07  2.675e-08     5.259 2.75e-07 ***
Range         5.510e-07  5.805e-08     9.491  < 2e-16 ***
Top_speed     1.601e-06  2.455e-07     6.524 2.89e-10 ***
Acceleration -4.715e-06  2.603e-06    -1.812    0.071 .  
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 6.436e-05 on 301 degrees of freedom
Multiple R-squared:  0.853, Adjusted R-squared:  0.8505 
F-statistic: 349.3 on 5 and 301 DF,  p-value: < 2.2e-16
prediction = predict(price_model, ecars, interval = 'prediction')
confidence = predict(price_model, ecars, interval = 'confidence')
prediction_dollars = ((prediction * lambda) + 1)^(1/lambda)
confidence_dollars = ((confidence * lambda) + 1)^(1/lambda)
predicted_price = data.frame(Name = ecars$Car_name,
                             Make = ecars$Make,
                             Price = ecars$Price/1000,
                             Predicted = (prediction_dollars[,1]/1000),
                             Predict_lwr = (prediction_dollars[,2]/1000),
                             Predict_upr = (prediction_dollars[,3]/1000),
                             Confidence_lwr = (confidence_dollars[,2]/1000),
                             Confidence_upr = (confidence_dollars[,3]/1000))
predicted_price
ggplot(NULL, aes(Predicted_price, Price)) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predicted), col = 'black', linetype = 'dashed') +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predict_lwr), col = 'red', linetype = 'dashed') +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predict_upr), col = 'red') +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Confidence_lwr), col = 'blue') +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Confidence_upr), col = 'blue') +
      geom_ribbon(aes(ymin = predicted_price$Confidence_lwr, ymax = predicted_price$Confidence_upr), fill = "grey70")+
      ylim(25,150) + xlim(25, 140) +
      geom_point(data = predicted_price, aes(x = Predicted, y = Price), alpha = .5) + 
      geom_point(data = most_makes, aes(x = mean_predicted, y = mean_price, col = Make), size = 3) +
      scale_color_manual(values = make_colors) +
      xlab("Predicted Price in 1000s of Euros") + ylab("Price in 1000s of Euros") +
      ggtitle('Price of Electric Vehicles with mean cost per Make')
Error in `geom_ribbon()`:
! Problem while computing aesthetics.
ℹ Error occurred in the 6th layer.
Caused by error:
! object 'Predicted_price' not found
Backtrace:
  1. base (local) `<fn>`(x)
  2. ggplot2:::print.ggplot(x)
  4. ggplot2:::ggplot_build.ggplot(x)
  5. ggplot2:::by_layer(...)
 12. ggplot2 (local) f(l = layers[[i]], d = data[[i]])
 13. l$compute_aesthetics(d, plot)
 14. ggplot2 (local) compute_aesthetics(..., self = self)
 15. base::lapply(aesthetics, eval_tidy, data = data, env = env)
 16. rlang (local) FUN(X[[i]], ...)



testa = ggplot(NULL, aes(Predicted_price, Price)) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predicted), 
                  col = 'blue', size = .8, alpha = .5) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predict_lwr), 
                  col = 'red', linetype = 'dashed', size = .8, alpha = .8) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predict_upr), 
                  col = 'red', linetype = 'dashed',size = .8, alpha = .8) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Confidence_lwr), 
                  col = 'black', linetype = 'dashed', size = .8, alpha = .8) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Confidence_upr), 
                  col = 'black', linetype = 'dashed', size = .8, alpha = .8) +
      geom_point(data = predicted_price, aes(x = Predicted, y = Price, text = Name), alpha = .5) +
      theme(legend.position = "right", legend.text = element_text(size = 8))+
      ylim(25, 250) + xlim(25, 250) +
      labs(title = "Predicted Price vs. Price for all EV Models",
           caption = "Data source: ToothGrowth",
           x = "Predicted price (euros in thousands)", y = "German Price (euros in thousands)",
           tag = "A")
Warning: Ignoring unknown aesthetics: text
ggplotly(testa, tooltip = c("x", 'y', "text")) 
`geom_smooth()` using method = 'loess' and formula = 'y ~ x'`geom_smooth()` using method = 'loess' and formula = 'y ~ x'Warning: Removed 4 rows containing non-finite values (`stat_smooth()`).`geom_smooth()` using method = 'loess' and formula = 'y ~ x'Warning: Removed 8 rows containing non-finite values (`stat_smooth()`).`geom_smooth()` using method = 'loess' and formula = 'y ~ x'Warning: Removed 1 rows containing non-finite values (`stat_smooth()`).`geom_smooth()` using method = 'loess' and formula = 'y ~ x'Warning: Removed 1 rows containing non-finite values (`stat_smooth()`).

unique(ecars_missing_price$Make)
 [1] "Rolls-Royce" "Hongqi"      "Audi"        "Peugeot"     "Mercedes"    "Opel"        "Polestar"    "Hyundai"    
 [9] "Volkswagen"  "XPENG"       "CUPRA"       "Genesis"     "Maserati"    "Mini"        "Seres"       "Volvo"      
[17] "Ford"        "Lexus"       "Skoda"       "Fiat"        "Kia"         "Toyota"     

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---
title: "R Notebook"
output: html_notebook
---

This is an [R Markdown](http://rmarkdown.rstudio.com) Notebook. When you execute code within the notebook, the results appear beneath the code. 

Try executing this chunk by clicking the *Run* button within the chunk or by placing your cursor inside it and pressing *Ctrl+Shift+Enter*. 

```{r}
library(dplyr)
library(ggplot2)
library(tidyr)
library(car)
library(MASS)
library(repr)
library(pals)
```
```{r}
getwd()
ecars_raw = read.csv('EV_cars.csv')

```
```{r}
ecars_raw = ecars_raw %>% rename(Price = Price.DE., Acceleration = acceleration..0.100.)
```

```{r}
make = strsplit(ecars_raw$Car_name, split = ' ')

make_ = c()
n = length(make)

for (i in 1:n) {
  make_[i] = make[[i]][1]
}

ecars_raw$Make = make_
```


```{r}
ecars_raw = ecars_raw %>% relocate(Make, .before = Car_name_link)
ecars_raw = ecars_raw %>% relocate(Battery, .after = Car_name_link)
ecars_raw
```

```{r}
ecars_raw = ecars_raw %>% filter(!is.na(Fast_charge))
ecars = ecars_raw %>% filter(!is.na(Price))
ecars_missing_price = ecars_raw %>% filter(is.na(Price))
write.csv(ecars,file='/Users/Natalie/git_proj/Is-your-electric-car-overpriced-/ecars.csv', row.names=FALSE)
write.csv(most_makes,file='/Users/Natalie/git_proj/Is-your-electric-car-overpriced-/most_makes.csv', row.names=FALSE)

```
```{r}
make_colors = c('#e6194b', '#f58231',  '#ffe119', 
                '#bcf60c','#3cb44b', '#008080',
                '#aaffc3', '#4363d8', '#000075',
                '#46f0f0', '#911eb4', '#e6beff',
                '#f032e6', '#fabebe')
```

```{r}
price_model_empty = lm(Price ~ 1, data = ecars)
price_model_full= lm(Price ~ Battery + Efficiency + Fast_charge + Range + Top_speed + Acceleration, data = ecars)
summary(price_model_full)
```
```{r}
ecars_missing_price
```

```{r}
scope = list(lower = formula(price_model_empty), upper = formula(price_model_full))
forwardAIC = step(price_model_empty, scope, direction = 'forward', k = 2)
```

```{r}
price_model_initial = lm(Price ~ Efficiency + Fast_charge + Range + Top_speed + Acceleration, data = ecars)
summary(price_model_initial)
bc = boxCox(price_model_initial)
lambda = bc$x[which(bc$y == max(bc$y))]
ecars$Price_lambda = (ecars$Price^lambda - 1)/lambda
price_model = lm(Price_lambda ~ Efficiency + Fast_charge + Range + Top_speed + Acceleration, data = ecars)
summary(price_model)
plot(price_model)
broom::glance(price_model)
```

```{r}
prediction = predict(price_model, ecars, interval = 'prediction')
confidence = predict(price_model, ecars, interval = 'confidence')
prediction_dollars = ((prediction * lambda) + 1)^(1/lambda)
confidence_dollars = ((confidence * lambda) + 1)^(1/lambda)
predicted_price = data.frame(Name = ecars$Car_name,
                             Make = ecars$Make,
                             Price = ecars$Price/1000,
                             Predicted = (prediction_dollars[,1]/1000),
                             Predict_lwr = (prediction_dollars[,2]/1000),
                             Predict_upr = (prediction_dollars[,3]/1000),
                             Confidence_lwr = (confidence_dollars[,2]/1000),
                             Confidence_upr = (confidence_dollars[,3]/1000))
predicted_price
write.csv(predicted_price,file='/Users/Natalie/git_proj/Is-your-electric-car-overpriced-/predicted_price.csv', row.names=FALSE)
```
```{r}
most_makes = predicted_price %>%
  group_by(Make)%>%
  filter(n() >= 10) %>%
  summarise(mean_price = mean(Price), mean_predicted = mean(Predicted))
most_makes
```
```{r}
predicted_price %>%
  filter(Make == 'Porsche')
```


```{r}

ggplot(NULL, aes(Predicted_price, Price)) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predicted), col = 'black') +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predict_lwr), col = 'red') +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predict_upr), col = 'red') +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Confidence_lwr), col = 'blue') +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Confidence_upr), col = 'blue') +
      ylim(0,300) +
      geom_point(data = predicted_price, aes(x = Predicted, y = Price), alpha = .5) +
      geom_point(data = most_makes, aes(x = mean_predicted, y = mean_price, col = Make), size = 3) +
      scale_color_manual(values = make_colors)

ggplot(NULL, aes(Predicted_price, Price)) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predicted), col = 'black', linetype = 'dashed') +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predict_lwr), col = 'red', linetype = 'dashed') +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predict_upr), col = 'red') +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Confidence_lwr), col = 'blue') +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Confidence_upr), col = 'blue') +
      ylim(25,150) + xlim(25, 140) +
      geom_point(data = predicted_price, aes(x = Predicted, y = Price), alpha = .5) + 
      geom_point(data = most_makes, aes(x = mean_predicted, y = mean_price, col = Make), size = 3) +
      scale_color_manual(values = make_colors) +
      xlab("Predicted Price in 1000s of Euros") + ylab("Price in 1000s of Euros") +
      ggtitle('Price of Electric Vehicles with mean cost per Make')


# geom_point(data = most_makes, aes(x = mean_price, y = mean_predicted), size = 3, shape = 23, fill = make_colors) +


```
```{r}
   
    ggplot(NULL, aes(Predicted_price, Price)) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predicted), 
                  col = 'blue', size = .5, alpha = .8) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predict_lwr), 
                  col = 'red', linetype = 'dashed', alpha = .8) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predict_upr), 
                  col = 'red', linetype = 'dashed', alpha = .8) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Confidence_lwr), 
                  col = 'black', linetype = 'dashed', alpha = .8) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Confidence_upr), 
                  col = 'black', linetype = 'dashed', alpha = .8) +
      geom_point(data = predicted_price, aes(x = Predicted, y = Price), alpha = .5) +
      geom_point(data = most_makes, aes(x = mean_predicted, y = mean_price), size = 3) +
      geom_point(data = most_makes, aes(x = mean_predicted, y = mean_price, col = Make), size = 2) +
      theme(legend.position = "bottom", legend.text = element_text(size = 8))+
      ylim(25, 250) + xlim(25, 250) +
      xlab("Predicted price (euros in thousands)") + ylab("Price (euros in thousands)") +
      ggtitle('Predicted Price vs. Price for all EV Models')  
```

```{r}
 ggplot(NULL, aes(Predicted_price, Price)) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predicted), 
                  col = 'blue', size = .8, alpha = .5) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predict_lwr), 
                  col = 'red', linetype = 'dashed', size = .8, alpha = .8) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predict_upr), 
                  col = 'red', linetype = 'dashed',size = .8, alpha = .8) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Confidence_lwr), 
                  col = 'black', linetype = 'dashed', size = .8, alpha = .8) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Confidence_upr), 
                  col = 'black', linetype = 'dashed', size = .8, alpha = .8) +
      geom_point(data = predicted_price, aes(x = Predicted, y = Price), alpha = .5) +
      geom_point(data = most_makes, aes(x = mean_predicted, y = mean_price), size = 3) +
      geom_point(data = most_makes, aes(x = mean_predicted, y = mean_price, col = Make), size = 2) +
      scale_color_manual(values = make_colors) +
      theme(legend.position = "right", legend.text = element_text(size = 8))+
      ylim(25, 140) + xlim(25, 110) +
      labs(title = "Predicted Price vs. Price for all EV Models",
           subtitle = "Mean model price for makes with 10+ models included",
           caption = "Data source: ToothGrowth",
           x = "Predicted price (euros in thousands)", y = "German Price (euros in thousands)",
           tag = "A")
```

```{r}


testa = ggplot(NULL, aes(Predicted_price, Price)) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predicted), 
                  col = 'blue', size = .8, alpha = .5) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predict_lwr), 
                  col = 'red', linetype = 'dashed', size = .8, alpha = .8) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Predict_upr), 
                  col = 'red', linetype = 'dashed',size = .8, alpha = .8) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Confidence_lwr), 
                  col = 'black', linetype = 'dashed', size = .8, alpha = .8) +
      geom_smooth(data = predicted_price, aes(x = Predicted, y = Confidence_upr), 
                  col = 'black', linetype = 'dashed', size = .8, alpha = .8) +
      geom_point(data = predicted_price, aes(x = Predicted, y = Price, text = Name), alpha = .5) +
      theme(legend.position = "right", legend.text = element_text(size = 8))+
      ylim(25, 250) + xlim(25, 250) +
      labs(title = "Predicted Price vs. Price for all EV Models",
           caption = "Data source: ToothGrowth",
           x = "Predicted price (euros in thousands)", y = "German Price (euros in thousands)",
           tag = "A")

ggplotly(testa, tooltip = c("x", 'y', "text")) 
```

```{r}
ecars
ggplot(data = ecars, aes(x = Battery, y = Price)) + 
  geom_point()
```

```{r}
unique(ecars_missing_price$Make)

```

```{r}
prediction_missing = predict(price_model, ecars_missing_price, interval = 'prediction')
prediction_missing
prediction_missing_dollars = ((prediction_missing * lambda) + 1)^(1/lambda)

predicted_missing_price = data.frame(Name = ecars_missing_price$Car_name,
                             Make = ecars_missing_price$Make,
                             Predicted = (prediction_missing_dollars[,1]/1000))
                           
predicted_missing_price
```

```{r}
predicted_missing_price %>%
  group_by(Make) %>%
  filter(n()>=3)

predicted_missing_price %>%
  filter(Make == 'Rolls-Royce')
```

```{r}
summary(price_model)
plot(price_model)
saveRDS(price_model, "model.rds")
```

```{r}
                                                                 
```

```{r}

```

```{r}

```

```{r}

```

```{r}

```

```{r}

```

```{r}

```

```{r}

```

Add a new chunk by clicking the *Insert Chunk* button on the toolbar or by pressing *Ctrl+Alt+I*.

When you save the notebook, an HTML file containing the code and output will be saved alongside it (click the *Preview* button or press *Ctrl+Shift+K* to preview the HTML file).

The preview shows you a rendered HTML copy of the contents of the editor. Consequently, unlike *Knit*, *Preview* does not run any R code chunks. Instead, the output of the chunk when it was last run in the editor is displayed.
